This data set contains lidar point data (Geodetic Coordinates) from a strip of Southern
California coastline (including water, beach, cliffs, and top of cliffs) from Newport
Beach to the US/Mexico border. The data set was created by combining data collected
using an Optech Inc. Airborne Laser Terrain Mapper (ALTM) 1225 in combination with
geodetic quality Global Positioning System (GPS) airborne and ground-based receivers.
The Bureau of Economic Geology, the University of Texas at Austin owns and operates
an ALTM 1225 system (serial number 99d118). The system was installed in a twin engine
Partenavia P-68 (tail number N6602L) owned and operated by Aspen Helicopter, Inc.
The lidar data set described by this document was collected on 24 and 25 October 2003;
Julian Days 29703 and 29803 (see Lineage, Source_Information, Source_Contribution
for pass information). Conditions on both days were haze, low clouds, and smoke over
Los Angeles and Camp Pendleton. 99d118 instrument settings for these flights were;
laser pulse rate: 25kHz, scanner rate: 26Hz, scan angle: +/- 20deg, beam divergence:
narrow, altitude: 1038-1106m AGL, and ground speed: 99-119kts. Three GPS base stations
(Seal Beach, Dana Point, and Point Loma, see Lineage, Source_Information, Source_Contribution
for coordinates) were operating during the survey. Data represented is all points
including terrain, vegetation, and structures. This data also contains returns from
the water surface. No processing has been done to remove returns from terrain, vegetation,
structures or water surfaces.